/* ================================================
   LANGGANIN — Modern UI Design
   Clean · Professional · Responsive
   Inspired by modern SaaS design
   ================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800&display=swap');

/* ---- RESET ---- */
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

:root {
  /* Modern Color Palette */
  --bg:        #f8fafc;
  --bg2:       #ffffff;
  --bg3:       #f1f5f9;
  --border:    #e2e8f0;
  --border2:   #cbd5e1;
  --text:      #1e293b;
  --text-muted: #64748b;
  --accent:    #3b82f6;
  --accent-hover: #2563eb;
  --accent-light: #dbeafe;
  --green:     #10b981;
  --green-light: #d1fae5;
  --red:       #ef4444;
  --red-light: #fee2e2;
  --yellow:    #f59e0b;
  --yellow-light: #fef3c7;
  --blue:      #3b82f6;
  --purple:    #8b5cf6;
  --purple-light: #ede9fe;
  
  /* Spacing */
  --radius:    12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow:    0 1px 3px rgba(0,0,0,0.1), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  --trans:     all 0.2s cubic-bezier(0.4,0,0.2,1);
}

html { scroll-behavior: smooth; }
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  min-height: 100vh;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
input, button, select, textarea { font-family: inherit; }

::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg3); }
::-webkit-scrollbar-thumb { background: #cbd5e1; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: #94a3b8; }

/* ============================
   NAVBAR - Modern Clean Design
   ============================ */
.navbar {
  position: sticky; top: 0; z-index: 200;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 70px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}
.navbar-brand {
  font-size: 1.25rem; font-weight: 700;
  color: var(--text); letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 0.6rem;
  transition: var(--trans);
}
.navbar-brand:hover { color: var(--accent); }
.navbar-brand em { color: var(--accent); font-style: normal; }
.navbar-menu { display: flex; align-items: center; gap: 0.5rem; }
.navbar-menu a {
  padding: 0.5rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem; font-weight: 500;
  color: var(--text-muted); transition: var(--trans);
}
.navbar-menu a:hover {
  color: var(--text); background: var(--bg3);
}
.navbar-menu a.active {
  color: var(--accent); background: var(--accent-light);
}
.nav-balance {
  padding: 0.5rem 1rem;
  background: var(--green-light);
  color: var(--green);
  border-radius: 99px;
  font-size: 0.875rem; font-weight: 600;
  border: 1px solid rgba(16,185,129,0.2);
  margin-left: 0.5rem;
}
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  cursor: pointer; padding: 8px; background: none; border: none;
  border-radius: var(--radius-sm);
}
.nav-toggle:hover { background: var(--bg3); }
.nav-toggle span {
  display: block; width: 22px; height: 2.5px;
  background: var(--text); border-radius: 2px; transition: var(--trans);
}

/* ============================
   BUTTONS - Modern Style
   ============================ */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.5rem;
  padding: 0.65rem 1.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.9375rem; font-weight: 600;
  cursor: pointer; border: none;
  transition: var(--trans); white-space: nowrap;
  text-decoration: none; line-height: 1.4;
  box-shadow: var(--shadow);
}
.btn:disabled { opacity: 0.5; cursor: not-allowed !important; }

.btn-primary {
  background: var(--accent); color: #fff;
}
.btn-primary:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md), 0 0 0 4px rgba(59,130,246,0.1);
}
.btn-secondary {
  background: var(--bg2);
  color: var(--text);
  border: 1px solid var(--border);
}
.btn-secondary:hover:not(:disabled) { 
  background: var(--bg3);
  border-color: var(--border2);
}
.btn-outline {
  background: transparent; color: var(--text);
  border: 1px solid var(--border2);
}
.btn-outline:hover { background: var(--bg3); border-color: var(--border2); }
.btn-danger {
  background: var(--red-light);
  color: var(--red);
  border: 1px solid rgba(239,68,68,0.3);
}
.btn-danger:hover { background: #fecaca; }
.btn-sm  { padding: 0.5rem 1rem; font-size: 0.875rem; }
.btn-lg  { padding: 0.75rem 2rem; font-size: 1rem; }
.btn-full { width: 100%; }

/* ============================
   FORMS - Clean Design
   ============================ */
.form-group { margin-bottom: 1.25rem; }
.form-label {
  display: block;
  font-size: 0.875rem; font-weight: 600;
  color: var(--text); 
  margin-bottom: 0.5rem;
}
.form-input {
  width: 100%;
  padding: 0.75rem 1rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); font-size: 0.9375rem;
  transition: var(--trans); outline: none;
}
.form-input::placeholder { color: var(--text-muted); }
.form-input:focus {
  border-color: var(--accent);
  background: var(--bg2);
  box-shadow: 0 0 0 3px var(--accent-light);
}
.form-input.error { border-color: var(--red); }
.form-hint { font-size: 0.8125rem; color: var(--text-muted); margin-top: 0.375rem; }

/* ============================
   BADGES - Modern
   ============================ */
.badge {
  display: inline-flex; align-items: center;
  padding: 4px 12px; border-radius: 999px;
  font-size: 0.75rem; font-weight: 600;
  letter-spacing: 0.02em; white-space: nowrap;
}
.badge-success { background: rgba(52,211,153,0.1); color: var(--green-light); }
.badge-warning { background: rgba(251,191,36,0.1);  color: var(--yellow-light); }
.badge-danger  { background: rgba(248,113,113,0.1); color: var(--red-light); }
.badge-info    { background: rgba(96,165,250,0.1);  color: var(--blue); }
.badge-purple  { background: rgba(59,130,246,0.1); color: var(--accent); }
.badge-muted   { background: var(--bg); color: var(--text-muted); border: 1px solid var(--border); }

/* ============================
   ALERTS - Clean Modern Design
   ============================ */
.alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem; font-weight: 500;
  border: 1px solid transparent;
  line-height: 1.5;
  box-shadow: var(--shadow-sm);
}
.alert-success { 
  background: rgba(52,211,153,0.1);  
  color: var(--green-light);  
  border-color: rgba(52,211,153,0.25); 
}
.alert-danger  { 
  background: rgba(248,113,113,0.1); 
  color: var(--red-light);    
  border-color: rgba(248,113,113,0.25); 
}
.alert-info    { 
  background: rgba(96,165,250,0.1);  
  color: var(--blue);   
  border-color: rgba(96,165,250,0.25); 
}
.alert-warning { 
  background: rgba(251,191,36,0.1);  
  color: var(--yellow-light); 
  border-color: rgba(251,191,36,0.25); 
}

/* ============================
   LOADING - Smooth Spinner
   ============================ */
.spinner {
  width: 40px; height: 40px;
  border: 3px solid var(--border2);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  margin: 3rem auto;
}
@keyframes spin { to { transform: rotate(360deg); } }
.loading-wrap {
  display: flex; flex-direction: column; align-items: center;
  justify-content: center; gap: 1rem;
  min-height: 40vh; color: var(--text-muted); font-size: 0.875rem;
}

/* ============================
   MODAL - Clean White Design
   ============================ */
.modal {
  position: fixed; inset: 0; z-index: 1000;
  display: none; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 1rem;
}
.modal.active { display: flex; }
.modal-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%; max-width: 480px;
  max-height: 90vh; overflow-y: auto;
  box-shadow: var(--shadow-xl);
  animation: popUp 0.25s cubic-bezier(.34,1.56,.64,1);
}
.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 1.5rem;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--bg2); z-index: 1;
}
.modal-header h3 { font-size: 1.125rem; font-weight: 700; color: var(--text); }
.modal-close {
  width: 36px; height: 36px;
  border-radius: var(--radius-sm); 
  background: var(--bg);
  border: 1px solid var(--border); 
  cursor: pointer; 
  color: var(--text-muted); 
  font-size: 1.25rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--trans);
}
.modal-close:hover { 
  background: var(--bg2); 
  color: var(--text); 
  border-color: var(--border2);
}
.modal-body { padding: 1.5rem; }
.modal-footer {
  padding: 1.25rem 1.5rem;
  border-top: 1px solid var(--border);
  display: flex; gap: 0.75rem; justify-content: flex-end;
}

@keyframes popUp {
  from { transform: scale(0.95) translateY(10px); opacity: 0; }
  to   { transform: scale(1) translateY(0); opacity: 1; }
}
@keyframes fadeIn { from { opacity: 0; } to { opacity: 1; } }
@keyframes slideUp { 
  from { transform: translateY(20px); opacity: 0; } 
  to { transform: translateY(0); opacity: 1; } 
}

/* ============================
   TOAST - Modern Notifications
   ============================ */
.toast-container {
  position: fixed; bottom: 1.5rem; right: 1.5rem;
  display: flex; flex-direction: column; gap: 0.75rem;
  z-index: 9999; pointer-events: none;
}
.toast {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem; font-weight: 600;
  min-width: 260px; max-width: 340px;
  box-shadow: var(--shadow-xl);
  display: flex; align-items: center; gap: 0.75rem;
  animation: slideUp 0.3s ease;
  pointer-events: auto;
}
.toast-success { 
  background: rgba(52,211,153,0.95); 
  color: white;  
  border: 1px solid rgba(52,211,153,1); 
}
.toast-error   { 
  background: rgba(248,113,113,0.95); 
  color: white;    
  border: 1px solid rgba(248,113,113,1); 
}
.toast-info    { 
  background: rgba(96,165,250,0.95); 
  color: white;   
  border: 1px solid rgba(96,165,250,1); 
}

/* ============================
   LAYOUT - Modern Spacing
   ============================ */
.container {
  max-width: 1200px; margin: 0 auto; padding: 0 2rem;
}
.page { padding: 3rem 0; min-height: calc(100vh - 70px); }
.page-header { margin-bottom: 2.5rem; }
.page-header h1 { 
  font-size: 2rem; font-weight: 700; letter-spacing: -0.02em;
  color: var(--text); margin-bottom: 0.5rem;
}
.page-header p  { 
  color: var(--text-muted); font-size: 1rem; line-height: 1.6;
}
.section-title  { font-size: 1.25rem; font-weight: 700; margin-bottom: 1.5rem; }

/* ============================
   STAT CARDS - Clean Design
   ============================ */
.stats-row {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1.25rem; margin-bottom: 2.5rem;
}
.stat-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.5rem;
  transition: var(--trans);
  box-shadow: var(--shadow);
}
.stat-card:hover { 
  border-color: var(--accent); 
  transform: translateY(-2px); 
  box-shadow: var(--shadow-lg);
}
.stat-label {
  font-size: 0.8125rem; font-weight: 600; color: var(--text-muted);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 0.75rem;
}
.stat-value {
  font-size: 1.875rem; font-weight: 700; letter-spacing: -0.02em;
}
.stat-value.green  { color: var(--green); }
.stat-value.yellow { color: var(--yellow); }
.stat-value.blue   { color: var(--blue); }
.stat-value.purple { color: var(--accent); }

/* ============================
   PRODUCT CARDS - Modern Clean Design
   ============================ */
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.product-card {
  background: var(--bg2); 
  border: 1px solid var(--border);
  border-radius: var(--radius); 
  overflow: hidden;
  transition: var(--trans); 
  display: flex; 
  flex-direction: column;
  cursor: pointer;
  box-shadow: var(--shadow);
  position: relative;
}
.product-card:hover {
  border-color: var(--accent);
  transform: translateY(-4px);
  box-shadow: var(--shadow-xl);
}
/* Product image */
.product-image {
  width: 100%;
  height: 180px;
  overflow: hidden;
  background: linear-gradient(135deg, #f8fafc 0%, #f1f5f9 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  border-bottom: 1px solid var(--border);
}
.product-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  transition: var(--trans);
}
.product-card:hover .product-image img {
  transform: scale(1.05);
}
/* Product content */
.product-card > *:not(.product-image) {
  padding-left: 1.5rem;
  padding-right: 1.5rem;
}
.product-card > .product-cat {
  padding-top: 1.25rem;
}
.product-card > .product-footer {
  padding-bottom: 1.5rem;
}
.product-card::after {
  content: '→';
  position: absolute; right: 1.5rem; top: 1.5rem;
  font-size: 1.25rem; color: var(--accent); opacity: 0;
  transition: var(--trans);
  background: var(--bg2);
  width: 32px; height: 32px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-md);
}
.product-card:hover::after { opacity: 1; transform: translateX(0px); }
.product-name {
  font-size: 1.0625rem; font-weight: 700;
  letter-spacing: -0.01em; 
  padding-right: 2rem;
  margin-top: 0.5rem;
  color: var(--text);
}
.product-cat {
  font-size: 0.75rem; font-weight: 600;
  color: var(--accent); text-transform: uppercase; letter-spacing: 0.05em;
  margin-bottom: 0.15rem;
}
.product-desc {
  font-size: 0.875rem; color: var(--text-muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-top: 0.5rem;
  margin-bottom: 1rem;
}
.product-footer {
  display: flex; align-items: center; justify-content: space-between;
  margin-top: auto; padding-top: 0.75rem;
  border-top: 1px solid var(--border);
}
.variant-count {
  font-size: 0.75rem; font-weight: 600;
  color: var(--accent);
  background: rgba(59,130,246,0.1);
  border: 1px solid rgba(59,130,246,0.2);
  padding: 4px 10px; border-radius: 999px;
}
.product-price-from {
  font-size: 0.8125rem; color: var(--text-muted);
}
.product-price-from strong {
  color: var(--green); font-weight: 700; font-size: 0.9375rem;
}

/* ============================
   VARIANT POPUP MODAL - Clean White Design
   ============================ */
.vmodal {
  position: fixed; inset: 0; z-index: 900;
  display: none; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.4);
  backdrop-filter: blur(8px); -webkit-backdrop-filter: blur(8px);
  padding: 1rem;
}
.vmodal.active { display: flex; }
.vmodal-box {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%; max-width: 540px;
  max-height: 90vh;
  display: flex; flex-direction: column;
  box-shadow: var(--shadow-xl);
  animation: popUp 0.25s cubic-bezier(.34,1.56,.64,1);
}
.vmodal-header {
  display: flex; align-items: flex-start; justify-content: space-between; gap: 1rem;
  padding: 1.5rem; flex-shrink: 0;
  border-bottom: 1px solid var(--border);
}
.vmodal-title { 
  font-size: 1.125rem; font-weight: 700; 
  letter-spacing: -0.01em; color: var(--text);
}
.vmodal-cat { 
  font-size: 0.75rem; font-weight: 600; 
  color: var(--accent); text-transform: uppercase; 
  letter-spacing: 0.05em; margin-top: 0.25rem; 
}
.vmodal-close {
  width: 36px; height: 36px; flex-shrink: 0;
  border-radius: var(--radius-sm); 
  background: var(--bg);
  border: 1px solid var(--border); 
  cursor: pointer; 
  color: var(--text-muted); 
  font-size: 1.25rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--trans);
}
.vmodal-close:hover { 
  background: var(--bg2); 
  color: var(--text); 
  border-color: var(--border2);
}
.vmodal-desc {
  padding: 1rem 1.5rem;
  font-size: 0.875rem; color: var(--text-muted); line-height: 1.6;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.vmodal-body {
  overflow-y: auto; flex: 1;
  padding: 0.75rem 1.5rem 1.5rem;
}
.vmodal-body::-webkit-scrollbar { width: 6px; }
.vmodal-body::-webkit-scrollbar-track { background: var(--bg); }
.vmodal-body::-webkit-scrollbar-thumb { 
  background: var(--border2); 
  border-radius: 99px; 
}
.vmodal-body::-webkit-scrollbar-thumb:hover { 
  background: var(--accent); 
}

/* ============================
   VARIANT ITEMS - Clean List Design
   ============================ */
.variant-item {
  padding: 1rem 0;
  border-bottom: 1px solid var(--border);
}
.variant-item:last-child { border-bottom: none; }
.variant-name { 
  font-size: 0.9375rem; font-weight: 700; 
  margin-bottom: 0.5rem; color: var(--text);
}
.variant-meta {
  display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 0.75rem;
}
.variant-meta span {
  font-size: 0.75rem; color: var(--text-muted);
  background: var(--bg);
  padding: 3px 9px; border-radius: var(--radius-sm);
  border: 1px solid var(--border);
}
.variant-row {
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.price-group { flex: 1; }
.price-sell {
  font-size: 1.125rem; font-weight: 700;
  color: var(--green); letter-spacing: -0.01em;
}
.price-original {
  font-size: 0.8125rem; color: var(--text-muted); text-decoration: line-through;
  margin-left: 4px;
}
.btn-buy {
  padding: 0.5rem 1.25rem;
  background: var(--accent); color: #fff;
  border: none; border-radius: var(--radius-sm);
  font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: var(--trans); 
  white-space: nowrap;
  box-shadow: var(--shadow-sm);
}
  flex-shrink: 0;
}
.btn-buy:hover { 
  background: #2563eb; 
  transform: translateY(-1px); 
  box-shadow: var(--shadow-md);
}
.btn-buy:disabled { 
  opacity: 0.4; cursor: not-allowed; 
  transform: none; box-shadow: none; 
}

/* ============================
   TABLE - Clean Modern Design
   ============================ */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--bg2);
}
table { width: 100%; border-collapse: collapse; }
thead th {
  padding: 1rem 1.25rem; text-align: left;
  font-size: 0.75rem; font-weight: 600;
  color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em;
  background: var(--bg);
  border-bottom: 1px solid var(--border); white-space: nowrap;
}
tbody td {
  padding: 1rem 1.25rem; font-size: 0.875rem;
  border-bottom: 1px solid var(--border); vertical-align: middle;
  color: var(--text);
}
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover td { background: var(--bg); }

/* ============================
   AUTH PAGES - Modern Clean Design
   ============================ */
.auth-wrap {
  min-height: 100vh; display: flex; align-items: center;
  justify-content: center; padding: 2rem 1rem;
  background: var(--bg);
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(59,130,246,0.08) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(52,211,153,0.06) 0%, transparent 40%);
}
.auth-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 2.5rem;
  width: 100%; max-width: 420px; 
  box-shadow: var(--shadow-lg);
}
.auth-header { text-align: center; margin-bottom: 2rem; }
.auth-logo   { 
  font-size: 1.5rem; font-weight: 700; 
  letter-spacing: -0.02em; color: var(--text);
}
.auth-logo em { color: var(--accent); font-style: normal; }
.auth-tagline { 
  color: var(--text-muted); font-size: 0.875rem; 
  margin-top: 0.5rem; line-height: 1.5;
}
.auth-footer {
  text-align: center; margin-top: 1.5rem;
  color: var(--text-muted); font-size: 0.875rem;
}
.auth-footer a { color: var(--accent); font-weight: 600; text-decoration: none; }
.auth-footer a:hover { text-decoration: underline; }

/* ============================
   LANDING PAGE - Modern Hero
   ============================ */
.hero {
  padding: 6rem 0 5rem; text-align: center;
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(59,130,246,0.12) 0%, transparent 50%);
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.375rem 1rem;
  background: rgba(59,130,246,0.1); border: 1px solid rgba(59,130,246,0.2);
  border-radius: 999px;
  font-size: 0.75rem; font-weight: 600; color: var(--accent);
  text-transform: uppercase; letter-spacing: 0.05em; margin-bottom: 1.5rem;
}
.hero h1 {
  font-size: clamp(2.25rem, 6vw, 3.75rem);
  font-weight: 800; letter-spacing: -0.03em;
  line-height: 1.1; margin-bottom: 1.25rem;
  color: var(--text);
}
.hero h1 em { color: var(--accent); font-style: normal; }
.hero-sub {
  font-size: 1.125rem; color: var(--text-muted);
  max-width: 560px; margin: 0 auto 2.5rem; line-height: 1.6;
}
.hero-cta { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }

.features { padding: 4rem 0; border-top: 1px solid var(--border); }
.features-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 1.5rem;
}
.feature-card {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 1.75rem;
  transition: var(--trans);
  box-shadow: var(--shadow);
}
.feature-card:hover { 
  border-color: var(--accent); 
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
}
.feature-icon {
  width: 48px; height: 48px; border-radius: var(--radius);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin-bottom: 1rem;
}
.fi-purple { background: rgba(59,130,246,0.1); }
.fi-green  { background: rgba(52,211,153,0.1); }
.fi-yellow { background: rgba(251,191,36,0.1); }
.fi-blue   { background: rgba(96,165,250,0.1); }
.feature-card h3 { 
  font-size: 1rem; font-weight: 700; 
  margin-bottom: 0.5rem; color: var(--text);
}
.feature-card p  { 
  font-size: 0.875rem; color: var(--text-muted); line-height: 1.6; 
}

.stats-section { padding: 3rem 0 4rem; border-top: 1px solid var(--border); }
.stats-row-hero {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 1.5rem; text-align: center;
}
.stat-num  { 
  font-size: 2.5rem; font-weight: 800; 
  color: var(--accent); letter-spacing: -0.03em; 
}
.stat-lbl  { 
  font-size: 0.875rem; color: var(--text-muted); 
  margin-top: 0.25rem; 
}

/* ============================
   BALANCE / TOPUP - Modern Buttons
   ============================ */
.topup-presets {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; margin-bottom: 1.25rem;
}
.preset-btn {
  padding: 0.75rem;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text); font-size: 0.875rem; font-weight: 600;
  cursor: pointer; transition: var(--trans); text-align: center;
  box-shadow: var(--shadow-sm);
}
.preset-btn:hover {
  background: var(--bg2);
  border-color: var(--accent); 
  color: var(--accent);
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

/* ============================
   EMPTY STATE - Clean Design
   ============================ */
.empty-state {
  text-align: center; padding: 5rem 1rem; color: var(--text-muted);
}
.empty-state .e-icon { 
  font-size: 3rem; margin-bottom: 1rem; opacity: 0.3; 
}
.empty-state h3 { 
  font-size: 1.125rem; font-weight: 700; 
  color: var(--text); margin-bottom: 0.5rem; 
}
.empty-state p  { 
  font-size: 0.875rem; margin-bottom: 1.5rem; 
  line-height: 1.5;
}

/* ============================
   WHATSAPP BUTTON - Green Theme
   ============================ */
.btn-wa-inline {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.375rem 0.875rem;
  background: rgba(37,211,102,0.1);
  color: #25d366;
  border: 1px solid rgba(37,211,102,0.2);
  border-radius: var(--radius-sm);
  font-size: 0.8125rem; font-weight: 600;
  cursor: pointer; transition: var(--trans); white-space: nowrap;
  line-height: 1.2;
}
.btn-wa-inline:hover {
  background: rgba(37,211,102,0.15);
  border-color: rgba(37,211,102,0.3);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(37,211,102,0.2);
}

/* ============================
   FOOTER - Minimal Design
   ============================ */
footer {
  padding: 2rem; border-top: 1px solid var(--border);
  text-align: center; color: var(--text-muted); font-size: 0.875rem;
  background: var(--bg2);
}

/* ============================
   UTILITIES - Helper Classes
   ============================ */
.text-green  { color: var(--green-light)  !important; }
.text-red    { color: var(--red-light)    !important; }
.text-yellow { color: var(--yellow-light) !important; }
.text-blue   { color: var(--blue)   !important; }
.text-accent { color: var(--accent) !important; }
.text-muted  { color: var(--text-muted)  !important; }
.fw-600 { font-weight: 600; }
.fw-700 { font-weight: 700; }
.fw-800 { font-weight: 800; }
.d-flex  { display: flex; }
.ai-center { align-items: center; }
.jc-between { justify-content: space-between; }
.gap-1 { gap: 0.5rem; }
.gap-2 { gap: 1rem; }
.mt-05 { margin-top: 0.5rem; }
.mt-1  { margin-top: 0.75rem; }
.mt-2  { margin-top: 1.25rem; }
.mb-1  { margin-bottom: 0.75rem; }
.mb-2  { margin-bottom: 1.25rem; }
.mb-3  { margin-bottom: 2rem; }
.mono  { font-family: 'Courier New', monospace; font-size: 0.875rem; }

/* ============================
   DARK MODE
   ============================ */
[data-theme="dark"] {
  --bg: #0f172a;
  --bg2: #1e293b;
  --bg3: #334155;
  --text: #f1f5f9;
  --text-muted: #94a3b8;
  --border: #334155;
  --border2: #475569;
  --accent: #60a5fa;
  --accent-hover: #3b82f6;
  --accent-light: rgba(96,165,250,0.15);
  --green: #34d399;
  --green-light: rgba(52,211,153,0.15);
  --red: #f87171;
  --red-light: rgba(248,113,113,0.15);
  --yellow: #fbbf24;
  --yellow-light: rgba(251,191,36,0.15);
  --blue: #60a5fa;
  --purple: #a78bfa;
  --purple-light: rgba(167,139,250,0.15);
  --shadow: 0 1px 3px rgba(0,0,0,0.4);
  --shadow-md: 0 4px 6px rgba(0,0,0,0.4);
  --shadow-lg: 0 10px 15px rgba(0,0,0,0.4);
  --shadow-xl: 0 20px 25px rgba(0,0,0,0.4);
}
[data-theme="dark"] .navbar {
  background: rgba(15,23,42,0.95);
  border-bottom-color: var(--border);
}
[data-theme="dark"] .navbar-menu {
  background: var(--bg2);
  border-bottom-color: var(--border);
}
[data-theme="dark"] .product-image {
  background: linear-gradient(135deg, #1e293b, #334155);
}
[data-theme="dark"] .hero {
  background-image: radial-gradient(ellipse 80% 50% at 50% -10%, rgba(96,165,250,0.15) 0%, transparent 50%);
}
[data-theme="dark"] .auth-wrap {
  background-image:
    radial-gradient(ellipse 80% 50% at 10% 0%, rgba(96,165,250,0.1) 0%, transparent 50%),
    radial-gradient(ellipse 60% 40% at 90% 100%, rgba(52,211,153,0.08) 0%, transparent 40%);
}
[data-theme="dark"] footer {
  background: var(--bg2);
  border-top-color: var(--border);
}
[data-theme="dark"] .product-card::after {
  background: var(--bg2);
}
[data-theme="dark"] ::-webkit-scrollbar-track { background: var(--bg3); }
[data-theme="dark"] ::-webkit-scrollbar-thumb { background: #475569; }
[data-theme="dark"] ::-webkit-scrollbar-thumb:hover { background: #64748b; }

/* Theme & language toggle buttons */
.nav-settings {
  display: flex; gap: 0.3rem; align-items: center; margin-left: 0.25rem;
}
.nav-stg-btn {
  width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  background: var(--bg);
  color: var(--text-muted);
  cursor: pointer; transition: var(--trans);
  font-size: 0.8rem; font-weight: 700;
  padding: 0; line-height: 1;
}
.nav-stg-btn:hover {
  background: var(--bg3);
  color: var(--text);
  border-color: var(--border2);
}
.nav-stg-btn.active {
  background: var(--accent-light);
  color: var(--accent);
  border-color: var(--accent);
}

/* ============================
   RESPONSIVE - Mobile Friendly
   ============================ */
@media (max-width: 768px) {
  .navbar { padding: 0 1rem; height: 62px; }
  .navbar-menu {
    display: none; position: absolute; top: 62px; left: 0; right: 0;
    background: var(--bg2); border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch;
    padding: 0.75rem; gap: 0.25rem;
    box-shadow: var(--shadow-lg);
    z-index: 201;
  }
  .navbar-menu.open { display: flex; }
  .navbar-menu a { 
    padding: 0.875rem 1rem; 
    border-radius: var(--radius-sm); 
  }
  .navbar-menu a:hover {
    background: var(--bg);
  }
  .nav-toggle { display: flex; }

  .page { padding: 1.5rem 0; }
  .page-header h1 { font-size: 1.35rem; }
  .auth-card { padding: 1.75rem 1.25rem; }
  .container { padding: 0 0.85rem; }
  .products-grid { grid-template-columns: 1fr; gap: 1rem; }
  .stats-row { grid-template-columns: repeat(2, 1fr); gap: 0.75rem; }
  .topup-presets { grid-template-columns: repeat(2, 1fr); }
  .hero { padding: 2.5rem 0 2rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero-sub { font-size: 0.95rem; }
  .hero-cta { flex-direction: column; align-items: stretch; }
  .features-grid { grid-template-columns: 1fr; }
  .stats-row-hero { grid-template-columns: repeat(2, 1fr); gap: 1rem; }

  /* Modal: bottom-sheet style on mobile */
  .modal { align-items: flex-end; padding: 0; }
  .modal-box {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 92vh;
  }
  .modal-header { padding: 1.25rem; }
  .modal-body { padding: 1.25rem; }
  .modal-footer { padding: 1rem 1.25rem; }

  /* Variant modal bottom-sheet */
  .vmodal { align-items: flex-end; padding: 0; }
  .vmodal-box {
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    max-height: 90vh;
  }
  .vmodal-header { padding: 1.25rem; }
  .vmodal-body { padding: 0.75rem 1.25rem 1.25rem; }
  .variant-row { flex-direction: column; align-items: stretch; gap: 0.5rem; }
  .variant-row .btn-buy { width: 100%; text-align: center; }

  /* Table responsive */
  .table-wrap { border-radius: var(--radius-sm); }
  thead th { padding: 0.75rem 0.75rem; font-size: 0.7rem; }
  tbody td { padding: 0.75rem 0.75rem; font-size: 0.8rem; }

  /* Stat cards compact */
  .stat-card { padding: 1.1rem; }
  .stat-value { font-size: 1.5rem; }

  /* Product card compact */
  .product-image { height: 140px; padding: 1.5rem; }
  .product-card > *:not(.product-image) {
    padding-left: 1.1rem; padding-right: 1.1rem;
  }

  /* Toast positioning */
  .toast-container { bottom: 1rem; right: 0.75rem; left: 0.75rem; }
  .toast { min-width: auto; max-width: 100%; }

  /* Utility spacing */
  .page-header { margin-bottom: 1.5rem; }
}

@media (max-width: 480px) {
  .stats-row { grid-template-columns: 1fr; }
  .modal-box { max-height: 92vh; }
  .topup-presets { grid-template-columns: 1fr; }
  .stats-row-hero { grid-template-columns: 1fr; }
  .stat-num { font-size: 2rem; }
  .page-header h1 { font-size: 1.2rem; }
  .container { padding: 0 0.65rem; }
  .navbar { padding: 0 0.75rem; }
  .btn { padding: 0.6rem 1rem; font-size: 0.875rem; }
  .btn-sm { padding: 0.4rem 0.75rem; font-size: 0.8rem; }
  .form-input { padding: 0.65rem 0.85rem; font-size: 0.875rem; }
}